pyswip on setting a variable on a variable

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Hello,

im trying to use pyswip to query 

gleich(A, B).

from the database

gleich(A, B):- A = B.

and would like to get 

A=B

but pyswip gives me 

[{'A': Variable(66), 'B': Variable(69)}]

Does anyone have an idea on how i can fix it?

Thanks in advance.